Aiming at the problems of the general quality characteristics index system of naval gun equipment, such as the difficulty of quantitative screening and poor applicability, combined with the characteristics of naval gun equipment system, combat mission and typical mission profile, on the basis of defining the principle of index screening, the general quality characteristics index system suitable for naval gun equipment was constructed by using expert scoring method, and the calculation method of key indexes was given. The results show that the system lays a foundation for the integrated design, simulation and verification of the general quality characteristics of naval gun equipment.